refactor: hide GPS satellites with empty values

app/src/main/java/com/geeksville/mesh/ui/NodeInfo.kt

@@ -216,6 +216,8 @@ fun NodeInfo(
                         suffix = elevationSuffix
                     )
 
+                    val satCount = position.satellitesInView
+                    if (satCount > 0) {
                         SatelliteCountInfo(
                             modifier = Modifier.constrainAs(sats) {
                                 top.linkTo(alt.bottom, 4.dp)
@@ -227,9 +229,10 @@ fun NodeInfo(
                                 )
                                 width = Dimension.preferredWrapContent
                             },
-                        satCount = position.satellitesInView
+                            satCount = satCount
                         )
                     }
+                }
 
                 BatteryInfo(
                     modifier = Modifier.constrainAs(batt) {